What "Sugar-Free" Means on an Electrolyte Label

Published by Electrodose, maker of Electrodose Berry Lemonade. We use our own published label as the example in this guide.

Short answer: On a US label, "sugar-free" or "zero sugar" means the product has less than 0.5 grams of sugars both per FDA reference amount and per labeled serving, and also meets ingredient and calorie-context conditions (21 CFR 101.60(c)). It doesn't mean zero carbohydrate, zero calories, or no sweetener. To know what's in your drink, check six things on the label: serving size, sugars, total carbohydrate, calories, sweeteners and allergens.

Six things to check on any electrolyte label

1. Serving size. Every number on the panel is given per serving, and a serving might be one scoop, one stick pack or one tablet. Compare products serving for serving, and note how many servings you actually use.
2. Total Sugars and Added Sugars. These lines tell you how much sugar a serving contains. "Sugars" here means free mono- and disaccharides such as glucose, fructose and sucrose (21 CFR 101.9(c)(6)(ii)).
3. Total Carbohydrate. Sugars are only one part of this number. It can also include starch, fiber, sugar alcohols and allulose (more on that below).
4. Calories. Low isn't the same as zero.
5. Sweeteners, in the ingredient list. A zero-sugar drink that tastes sweet is getting that sweetness from somewhere. The ingredient list is the only place that tells you which sweeteners are used.
6. Allergens. Electrolyte mixes with added functional ingredients can contain allergens you wouldn't expect in a salt-and-flavor drink.

The panel and the front of the tub are different things

The nutrition panel (Nutrition Facts, or Supplement Facts for dietary supplements) is a required declaration of what's in a serving. A front-of-package claim like "zero sugar" is optional wording that carries its own legal conditions. A product can show 0 g sugars on its panel without saying anything about sugar on the front.

A front-of-package "sugar-free" claim has three conditions (21 CFR 101.60(c)(1)):

1. Less than 0.5 g of sugars, measured two ways: per reference amount customarily consumed and per labeled serving. The reference amount is a standard amount FDA sets for each product category. For dietary supplements, it is generally the maximum amount the label recommends per eating occasion (21 CFR 101.12(b)).
2. No sugar ingredients, meaning no ingredient that is a sugar or that people generally understand to contain sugar, unless the ingredient list marks it as adding only a trivial amount of sugar.
3. Calorie context. The product either qualifies for a "low calorie" or "reduced calorie" claim, or the sugar-free claim is accompanied by a statement such as "not a low calorie food." Dietary supplements are treated differently: a supplement that meets the low-calorie definition satisfies this condition without a disclaimer, even though supplements in that position generally can't call themselves low calorie (21 CFR 101.60(c)(1)(iii)(A) and (a)(4)). So not every supplement making the claim needs a calorie statement.

Two tips for reading the panel itself:

• "0" is rounded. Sugars under 0.5 g and calories under 5 may be shown as zero (21 CFR 101.9(c)).
• A missing line usually means "rounds to zero." On a Supplement Facts panel, calories, carbohydrate and sugars are listed only when present above the amount that rounds to zero (21 CFR 101.36(b)(2)).

Why "zero sugar" isn't "zero carbs"

Total Carbohydrate is a chemical category, not a measure of how your body uses what's in it. FDA explains that carbohydrates include starch, sugars, sugar alcohols and dietary fibers, and that these have different physiological effects (FDA allulose guidance, 2020).

Two practical consequences:

• If you're counting carbohydrate for an eating pattern, read Total Carbohydrate, not just the sugar lines.
• A carbohydrate number also isn't automatically usable exercise fuel. Some of what it includes, such as fiber or allulose, behaves differently in the body from glucose.

Allulose: a sugar that may not appear on the sugar line

Chemically, allulose is a monosaccharide, an epimer of fructose (FDA guidance). In 2020, FDA said it intends to exercise enforcement discretion so manufacturers may leave allulose out of the Total Sugars and Added Sugars declarations and may count it at 0.4 calories per gram. It still counts in Total Carbohydrate (FDA constituent update).

That guidance is about what goes on the panel. It's non-binding, it was issued pending future rulemaking, and it doesn't address front-of-package claims like "sugar-free." So if you see allulose in an ingredient list, expect it in the carbohydrate total even when the sugar lines read zero, and don't read the guidance as settling any particular product's front-label wording.

Maltodextrin: read the sugar line, not just the ingredient name

Maltodextrin is made by partially breaking down starch. FDA defines it as a nonsweet, nutritive glucose polymer (21 CFR 184.1444), and it counts toward Total Carbohydrate and calories.

Starch breakdown produces a mixture of chain lengths, which can include some free glucose and maltose (Chronakis, Critical Reviews in Food Science and Nutrition, 1998). How much depends on the specific product. The ingredient name alone can't tell you the sugar content. The finished product's Total Sugars line is the figure to rely on.

Allulose and maltodextrin aren't interchangeable. One is a sweet monosaccharide with a specific FDA labeling policy; the other is a starch-derived carbohydrate mixture. Both count toward Total Carbohydrate.

Sweeteners: "sugar-free" doesn't mean unsweetened

Many zero-sugar drinks use high-intensity sweeteners, which FDA describes as many times sweeter than sugar while contributing few or no calories (FDA: Aspartame and Other Sweeteners in Food). Examples include:

• Steviol glycosides, sweet compounds that occur naturally in the leaves of the stevia plant and are reported to be 200 to 400 times sweeter than table sugar (FDA). They can also be produced through fermentation (FDA response to GRAS Notice 632). Rebaudioside M ("Reb M") is one steviol glycoside (FDA GRAS Notice 846).
• Monk fruit extract, reported to be 100 to 250 times sweeter than sugar (FDA).

High-intensity sweeteners are identified in the ingredient list. Their presence alone does not tell you the finished product's Total Sugars amount. If you want to avoid a particular sweetener, the ingredient list is where to look.

Example: what our published label reports

Here is what our published label reports, from the Supplement Facts panel and ingredient statement on the Electrodose Berry Lemonade product page (checked October 4, 2026).

A few notes on reading it:

• The panel reports zero sugars, alongside carbohydrate and calories: 1 g carbohydrate and 5 calories per scoop.
• The sweeteners are named in the ingredient list: Fermented Reb M (as OnoSweet®) and Stevia.
• 1 g of carbohydrate is not a substantial carbohydrate-fueling serving. If you want carbohydrate around training, it would need to come from another source, such as food.
• The published ingredient statement doesn't list allulose, maltodextrin or dextrose. "Natural Flavors" appears as a single term, so the statement alone doesn't show what any flavor carrier contains.
• Caffeine: Electrodose's declared product facts list 0 mg caffeine.
• Soy: the panel lists Phosphatidylserine 50% (from Soybean) and carries a "Contains: Soy" statement.

These are declarations from our published label and product facts. They are not independent laboratory results, and this guide doesn't assess whether any product, ours included, meets every condition for a labeling claim.

FAQ

Does "zero sugar" mean zero carbs? No. "Zero sugar" refers to the sugar lines. Total Carbohydrate can still include other carbohydrates, such as starch, fiber, sugar alcohols or allulose.

Is allulose a sugar? Chemically, yes. FDA describes it as a monosaccharide. In 2020 guidance, FDA said it intends to exercise enforcement discretion when manufacturers leave allulose out of Total Sugars and Added Sugars. Allulose still counts in Total Carbohydrate. That guidance covers panel declarations, not front-of-package "sugar-free" wording.

Does maltodextrin mean a product has sugar? The ingredient name alone doesn't tell you. Maltodextrin is a starch-derived carbohydrate that can contain some free sugars depending on the product, so check the finished product's Total Sugars line.

Does "sugar-free" mean no sweetener? No. Many sugar-free drinks use high-intensity sweeteners such as steviol glycosides or monk fruit extract. Check the ingredient list.

Check the full panel yourself

The fastest way to judge any electrolyte mix is the panel and ingredient list, not the front of the package. You can see the complete Electrodose Supplement Facts and ingredient statement on the Berry Lemonade product page. For more label and hydration explainers, browse Hydration Intel.

Sources

• 21 CFR 101.60 — Nutrient content claims for the calorie or sugar content of a food
• 21 CFR 101.9 — Nutrition labeling of food
• 21 CFR 101.36 — Nutrition labeling of dietary supplements
• 21 CFR 101.12 — Reference amounts customarily consumed per eating occasion
• FDA. The Declaration of Allulose and Calories from Allulose on Nutrition and Supplement Facts Labels: Guidance for Industry (October 2020, PDF)
• FDA constituent update on allulose (October 2020)
• 21 CFR 184.1444 — Maltodextrin
• Chronakis IS. On the molecular characteristics, compositional properties, and structural-functional mechanisms of maltodextrins: a review. Crit Rev Food Sci Nutr. 1998;38(7):599–637
• FDA: Aspartame and Other Sweeteners in Food
• FDA response letter, GRAS Notice 632 (rebaudioside A produced by fermentation)
• FDA GRAS Notice 846 (rebaudioside M)